Islamic Defenders Front, FPI, chairman Habib Riziq cancels plans to attend an event due to fear of being attacked.

Habib Riziq had planned to visit an Islamic boarding school in Demak, central Java, but there were rumours that his way to the school would be blocked by certain people hostile to the Front. Said the Islamic hard man:

Habib Riziq said that his men had gotten wind of a plan by a "certain organisation" to cause trouble during his visit.

I am not personally threatened but my non-appearance at the boarding school was agreed on with the police chief in order to keep the peace in central Java.
(Memang saya tidak terancam tetapi ketidakhadiran saya ke ponpes tersebut merupakan kesepakatan dengan Kapolda untuk menjaga kondisi Jateng agar tetap kondusif saja.)

It appears that the "certain group" is almost certainly the Garda Bangsa (see FPI, Garda Bangsa, & Gus Dur), or a similar association connected to the Nahdlatul Ulama, because as Habib Riziq explained: